Abaqus-Fluent简单CFD实例详解

ByNUAAByNUAAByNUAAByNUAAPh.DKongXianghongPh.DKongXianghongPh.DKongXianghongPh.DKongXianghong2012/9/282012/9/282012/9/282012/9/28Abaqus+FluentAbaqus+FluentAbaqus+FluentAbaqus+Fluent简单简单简单简单CFDCFDCFDCFD实例详解实例详解实例详解实例详解NUAANUAANUAANUAAPagePagePagePage����22221.TaskDescription1.TaskDescription1.TaskDescription1.TaskDescriptionNUAANUAANUAANUAA1、实例简介一个直径0.2米的水管与直径0.4m的水管连接在一起，如下图所示。水流从细水管流向粗水管，水在细水管中的流速为0.1m/s，求水流在粗、细水管中的速度场。2、解决方案将三维流动简化为二维轴对称流动问题。虽然Abaqus有CFD模块，但是不能做二维的CFD模拟。本例使用Abaqus做前处理，使用Fluent做水流的CFD仿真。PagePagePagePage����33332.Solution--2.Solution--2.Solution--2.Solution--Pre-ProcesswithAbaqus/CAEPre-ProcesswithAbaqus/CAEPre-ProcesswithAbaqus/CAEPre-ProcesswithAbaqus/CAE2.1.CreatePart2.1.CreatePart2.1.CreatePart2.1.CreatePartNUAANUAANUAANUAACreateModelDatabasewithStandard/ExplicitModel.Create2DPlanarShellPart.PagePagePagePage����44442.Solution2.Solution2.Solution2.Solution--------Pre-ProcesswithAbaqus/CAEPre-ProcesswithAbaqus/CAEPre-ProcesswithAbaqus/CAEPre-ProcesswithAbaqus/CAE2.2.MeshPart2.2.MeshPart2.2.MeshPart2.2.MeshPartNUAANUAANUAANUAA在MeshModule分割Part-1，如右图所示，并给Part-1布种子。给Part-1划分网格，如下图所示。PagePagePagePage����55552.Solution2.Solution2.Solution2.Solution--------Pre-ProcesswithAbaqus/CAEPre-ProcesswithAbaqus/CAEPre-ProcesswithAbaqus/CAEPre-ProcesswithAbaqus/CAE2.3.CreateInstance&GeometrySets2.3.CreateInstance&GeometrySets2.3.CreateInstance&GeometrySets2.3.CreateInstance&GeometrySetsNUAANUAANUAANUAA在AssemblyModule创建实体，如下图所示，并创建4个几何体集合，如右图所示。PagePagePagePage����66662.Solution2.Solution2.Solution2.Solution--------Pre-ProcesswithAbaqus/CAEPre-ProcesswithAbaqus/CAEPre-ProcesswithAbaqus/CAEPre-ProcesswithAbaqus/CAE2.4.CreateJob&WriteInput2.4.CreateJob&WriteInput2.4.CreateJob&WriteInput2.4.CreateJob&WriteInputNUAANUAANUAANUAAPagePagePagePage����77772.Solution--Fluent2.Solution--Fluent2.Solution--Fluent2.Solution--Fluent2.5.StartFluent&ImportInputFile2.5.StartFluent&ImportInputFile2.5.StartFluent&ImportInputFile2.5.StartFluent&ImportInputFileNUAANUAANUAANUAA启动Fluent，Versions选择2d，单击Run。在Fluent菜单栏单击File-Import-ABAQUS-InputFile，在弹出的SelectFile对话框中选择2.4中生成的inp文件，单击对话框OK按钮，完成导入模型。PagePagePagePage����88882.Solution2.Solution2.Solution2.Solution--Fluent--Fluent--Fluent--Fluent2.6.Modelmessage&Scale2.6.Modelmessage&Scale2.6.Modelmessage&Scale2.6.Modelmessage&ScaleNUAANUAANUAANUAA导入模型后在Fluent窗口中可见如下信息。单击菜单栏Grid-Scale，打开ScaleGrid对话框，可以查看和更改单位，本例无需更改，单击Close即可，如右图所示。PagePagePagePage����99992.Solution2.Solution2.Solution2.Solution--Fluent--Fluent--Fluent--Fluent2.7.GridCheck2.7.GridCheck2.7.GridCheck2.7.GridCheckNUAANUAANUAANUAA单击菜单栏Grid-Check，在Fluent窗口中可见如右图所示信息。PagePagePagePage����101010102.Solution2.Solution2.Solution2.Solution--Fluent--Fluent--Fluent--Fluent2.8.Definesolver2.8.Definesolver2.8.Definesolver2.8.DefinesolverNUAANUAANUAANUAA单击菜单栏Define-Models-solver。PagePagePagePage����111111112.Solution2.Solution2.Solution2.Solution--Fluent--Fluent--Fluent--Fluent2.9.DefineViscous2.9.DefineViscous2.9.DefineViscous2.9.DefineViscousNUAANUAANUAANUAA单击菜单栏Define-Models-solver，在ViscousModel单选框中选择k-epsilon(2eqn)，本例使用默认设置。PagePagePagePage����121212122.Solution2.Solution2.Solution2.Solution--Fluent--Fluent--Fluent--Fluent2.10.2.10.2.10.2.10.DefineMaterialsDefineMaterialsDefineMaterialsDefineMaterialsNUAANUAANUAANUAA单击菜单栏Define-Materials，在Materials对话框中设置如下，单击Change/Create，在弹出的消息框中单击Yes即可。PagePagePagePage����131313132.Solution2.Solution2.Solution2.Solution--Fluent--Fluent--Fluent--Fluent2.11.DefineOperatingConditions2.11.DefineOperatingConditions2.11.DefineOperatingConditions2.11.DefineOperatingConditionsNUAANUAANUAANUAA单击菜单栏Define-OperatingConditions，OperatingConditions对话框使用默认设置。PagePagePagePage����141414142.Solution2.Solution2.Solution2.Solution--Fluent--Fluent--Fluent--Fluent2.12.2.12.2.12.2.12.DefineBoundaryConditions(1)DefineBoundaryConditions(1)DefineBoundaryConditions(1)DefineBoundaryConditions(1)NUAANUAANUAANUAA单击菜单栏Define-BoundaryConditions，在BoundaryConditions对话框中设置Zone列表下的AXIS、INLET、OUTLET、WALL、solid-1的边界条件，其中前四个对应在Abaqus/CAE中创建的几何体几何，solid-1对应Abaqus模型中的壳。PagePagePagePage����151515152.Solution2.Solution2.Solution2.Solution--Fluent--Fluent--Fluent--Fluent2.12.2.12.2.12.2.12.DefineBoundaryConditions(2)DefineBoundaryConditions(2)DefineBoundaryConditions(2)DefineBoundaryConditions(2)NUAANUAANUAANUAAAXIS的类型设为axis。PagePagePagePage����161616162.Solution2.Solution2.Solution2.Solution--Fluent--Fluent--Fluent--Fluent2.12.2.12.2.12.2.12.DefineBoundaryConditions(3)DefineBoundaryConditions(3)DefineBoundaryConditions(3)DefineBoundaryConditions(3)NUAANUAANUAANUAAINLET的类型设为velocity-inlet，单击Set打开VelocityInlet对话框（或自动弹出），设置如右下图。PagePagePagePage����171717172.Solution2.Solution2.Solution2.Solution--Fluent--Fluent--Fluent--Fluent2.12.2.12.2.12.2.12.DefineBoundaryConditions(4)DefineBoundaryConditions(4)DefineBoundaryConditions(4)DefineBoundaryConditions(4)NUAANUAANUAANUAAPagePagePagePage����181818182.Solution2.Solution2.Solution2.Solution--Fluent--Fluent--Fluent--Fluent2.12.2.12.2.12.2.12.DefineBoundaryConditions(5)DefineBoundaryConditions(5)Def